Reasons Your Fiat 500 Key Fob Won't Work
A fiat 500 key fob is a convenient way to open the doors and start the car. There are a myriad of reasons why the fob may stop functioning. This could be due to a dead coin battery damage to the receiver module, water issues, and interference.
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Dead Coin Battery
The most frequent reason that your 500 key fob will not function is the battery is dead. Modern key fobs come with a restricted operating range, and must be within a few feet of the car to operate. If you are further away from your car and push the keyfob button it will not respond and display the message "Key Fob Not Detected".
If this happens, replace the battery in the coin cell (Part number CR2032) with a brand new one from a reliable brand such as Panasonic, Duracell, or Energizer. You can find them at the local hardware store or online.
You can test the coin-cell battery by pressing the buttons while standing near your Fiat 500. The parking lights will flash and the key fob will operate the lock and unlock switches.
If the fob's key doesn't work after replacing the battery, it may have water damage that stops it from connecting to the receiver module in your car. Water damage can occur in a number of ways, ranging from small splashes to submerging the fob salt water at the beach. If you suspect that your fob has been exposed to water, try placing it in a dry rice bag to pull the moisture out. If this does not work, you'll require your fob to be replaced by an auto locksmith or dealer.
Water Damage
While the fob has some rubber seals that keep water from the chip's electronic circuit it, submerging it in the ocean or washing it in a machine can cause water damage. Saltwater is particularly dangerous to the fob's circuit board, causing it to short out and eventually die. If you get the fob wet, it's not an option but if you drop it in an empty cup of water, or fail to take it out of your pocket before you run the washing machine Don't give up hope.
First, remove the battery. Before replacing G28 Car Keys clean the electronic chip with isopropyl, or a similar product. Then, test the fob to verify if it is working. If the key doesn't work, it might need to be programmed again. This is usually handled by a professional or dealer auto locksmith.
If your key is older and not programmed for your vehicle it is necessary to replace it completely. This is a straightforward process that can be completed by a professional locksmith for automotive use. The locksmith will need the key to be cut to match your car's ignition. The locksmith also needs to reprogram the fob into the vehicle's system. This is a cheap and quick process that could be completed on the same day.
Receiver Module Issues
The 500 key fob you have may not work because it's out of range. The remote has a range of 30 feet. So if you are too far from your vehicle it won't respond to your commands. This can easily be resolved by moving closer to your vehicle until it begins responding.
If you've replaced the battery in your coin (commonly known as a "button" or "watch") and your fob still won't work it could be due to an internal circuit board problem. Reprogramming your fob can resolve this issue. You can find the steps for the majority of vehicles on YouTube or in the owner's guide.
It may be necessary to replace the clips made of metal that hold the coin batteries in the correct position. If they lose tension they could stop the battery from being properly seated and cause your remote to malfunction.
In rare cases the fob may be out of connection with your vehicle as a result of hardware or software problems. This can cause a major problem, but you can frequently fix this issue by visiting an auto locksmith to have them reprogram your fob for you. In some cases it is possible that the software will require reinstallation to your body control modules.
Interference
In addition to a dead coin battery the key fob could not be able to transmit or receive the signal due to interference. This may happen if the keyfob's location is in close proximity to a radio transmitter like a cell phone or radar detector. Other reasons why the key fob may not function could be due to a weak connection to the buttons, damage to the internal chip or water damage.
If your key fob suddenly stopped working, or if you have tried everything at home to resolve it (e.g. replacing the battery, reprogramming it and using the spare key fob, you may have a faulty receiver module on your 500. The receiver module, which is located beneath the dashboard, receives radio frequency signals from your key fob. It converts them into electronic commands that the vehicle interprets.
Fortunately, there's an easy way to reset all of the onboard systems in your 500, including the key fob. Disconnect the 12 volt battery for about 15 minutes, by disconnecting the negative cable first then the positive cable. Then, reconnect the battery. This will clear out any remaining electricity and then restart the car's computers, which could allow you to get your key fob working again. If the issue continues, you should consult an expert technician. They can identify the exact cause of any issues.